var videoplay = {};
videoplay.addkeyback = function() {
  api.addEventListener({
      name: 'keyback'
  }, function(ret, err) {
    var playModule = api.require('playModule');
      playModule.isFullScreen(function(ret, err) {
        if (ret.status) {
        playModule.unfull(function(ret, err) {
          console.log('推出全屏')
        });
        }else {
          api.closeWin();
        }
      });
  });
}
